A shell script is a computer program designed to be run by the Unix shell, a command-line interpreter. The various dialects of shell scripts are considered to be scripting languages. Typical operations performed by shell scripts include file manipulation, program execution, and printing text.
The Logic behind shell scripting is to create automated task that you do on regular basis.. (Source:Wikipedia)
It contains the scripts that I wrote and use on the daily basis to make my life easier.